Number of Immigrants and Immigrants as Percentage of the US Population, 1850 to 2011

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Note: The term "immigrants" refers to people residing in the United States who were not US citizens at birth. This population includes naturalized citizens, lawful permanent residents (LPRs), certain legal nonimmigrants (e.g., persons on student or work visas), those admitted under refugee or asylee status, and persons illegally residing in the United States.

Source: The 2011 and 2010 data are from the US Census Bureau's American Community Surveys, the 2000 data are from Census 2000 (see All other data are from Gibson, Campbell and Emily Lennon, US Census Bureau, Working Paper No. 29, Historical Census Statistics on the Foreign-Born Population of the United States: 1850 to 1990, US Government Printing Office, Washington, DC, 1999.